Stratification of soil organic C, N and C:N ratio as affected by conservation tillage in two maize fields of China

Auteur(s) et Affiliation(s)

LOU, Y.

Ministry of Agriculture Key Lab. of Crop Nutrition and Fertilization, Inst. of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, Chine

XU, M.

Ministry of Agriculture Key Lab. of Crop Nutrition and Fertilization, Inst. of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, Chine

CHEN, X.

College of Resource and Environment, Northwest Univ., Yangling, Chine

HE, X.

Centre for Ecosystem Management/State Centre of Excellence for Ecohydrology, School of Natural Resources, Edith Cowan Univ., Joondalup, Australie

ZHAO, K.

Center for Agricultural Technology Service, Chaoyang, Chine

Description :
The work was conducted at 2 field experimental sites in the northeast of China. Soils were Cambisols and continuously cultivated with maize for 12 years (Jianping site, temperate semi-arid climate) and 5 years (Changtu site, temperate sub-humid climate). Two treatments were conducted at each site and were traditional tillage (TT, mouldboard plow with residue incorporation) and conservation tillage (CT, no-tillage with residues left on the soil surface). In the surface soil (0-20 cm), SOC and TN concentrations and C:N ratio were uniformly-distributed under TT. The responses of SOC and TN stocks to CT differed between the sites and among the soil depths. SOC storage was increased at 0–5 cm depth but decreased at 10–20 cm depth by conservation tillage at the Changtu site.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2012, vol. 95, p. 124-130, nombre de pages : 7, Références bibliographiques : 45 ref.

Date :
2012

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais